Improved centrifugal machine for filtering liquids



H. N. PRYATT. GENTRIFUGAL SUGAR MACHINE.

'No.35,441. PatentedJuhe3,1862

THE Nanms PETERS 00.. PHOTO-HTML. WASHINGTON. u. c.

3 of Belleville,jin theState of New Jersey, invented a new and' usefulImprovemhnt in in h UNITED STATES PATENT OFFICE.

HoRATIo n. FRYATT, on BELLEVILLE, NEW JERSEY.

IMPROVEDIQENTRIFUGAL MACHINE FORFILTERING'LVIQUIDS.

Specification forming part of Letters Patent No. 35.44 I. dated June 3,186 2 Be it knownthat I, HORATIO N. FRYATT,

, Machines for Filtering Liquids by Centrifugal Action; and I do herebydeclare that the following is a full, clear," and exact descriptionthereof, reference being hadto the accompafnying drawings, making partof thisspe'eifi- Y cation, in whichi Figure 1 is a vertical section ofthe machine, and Fig. 2 a horizontal section taken at the line AnofFig. 1. y

The same lettersindicate like parts in both figures.

j My said invention relates to-ilnprovements in thewell-known machinefor drying cloths by centrifugal force, and which has also been usedfor, separating molasses from the crystals of sugar, by which Ianienabled to apply it successfully to, the purposes of decolorizingsaccharine juices and otherliquids, and to the ectification of alcoholicliquors, and generally tofiltration for the separation of liquids fromimpurities; and my said invention eonsists in making the well-knowncentrifugal machine with a concentric annular compartment outside ofacentral chamber, and closed at top and bottom, and with the inner andouter peripheries of the said annular chamj her pervious, tocontainpulverized charcoal or other filtering or filtering and deeolorizing ordeodorizingsubstance,so that the liquid intro duced'in thecentralchamber shall be forced by centrifugal action from the centralchamber through the pervious inner periphery of the annular chamber,thence through the mate-- rial contained in the'said annular chamber;and my said invention also consists in combining with the annularfiltering-chamber a cap extending 'from its inner periphery,leav ing acentral opening for the introduction of the liquid-to the centralchamber, and an an n nular hoop extending downward from this cap,leaving a passage between its lower edge and the bottom of thecen'tralchamber for the passage of theliquid to be filtered, that a body 1 ofsuch liquid mayaccumulate against 1 and inside oftheinner peripheryof-the filtering chamber without dangerof its escape through thecentralfeed-holein the cap-plate. lathe accompanyingdrawings, arepresents avertical shaft with a pulley, b,'to receive a belt from some suitablemotor. To the upper end of this shaft is properly secured a circulardisk, 0, having a central conical pro ection, (I. On the top of thisdisk are secured two cylinders, c and f, forming an annularfiltering-chamber, g, the two cylinders being. madepervious'either byusing punched metal or wire-gauze, or both, or in any other suitablemanner. These pervious cylinders constitute the inner and outerperipheries of the filtering-chamber, which is to contain pulverjizedcharcoal or other suitable substance, as before stated. Thisfiltering-chamber is covercd byla cap-plate, h, which extends somedistance within the pervious cylinder 0, and to the under face of thiscap and at or near its inner periphery there is a hoop or thirdcylinder, 43, non-perforated, and of less depth than the cylinders e orf, so as to leave a passage, j, for the liquid to pass from the centerto an annular space, It, between the third cylinderyi, and the innerpervious periphery of the filteringchamber, where it can accumulate tobe carried by centrifugal force through the filtering medium. The wholeis surrounded by a casing, Z, having a central hole, at, at top for theintroduction of the liquid to be filtered, and a hole, a, at bottom forthe discharge of the liquid after it has been forced through thefiltering medium by the centrifugal forec due to the rotation. Thefilteringchamber is to be charged with pulverized charcoal or otherfiltering, decolorizing, or deodorizing material, depending upon theliquid to be treated, and the best way is to pack it in so that the mostfinclypulverized portion will be next to the outer periphery of thechamber, and gradually coarser toward the inner periphery.

The liquid to be treated is introduced in a constant stream through thecentral hole in the top of the surrounding casing, and falling on thesurface of the cone (1 is, by the centrifugal force due to the rapidrotation of the apparatus; forced outward under the lower edge of theinner cylinder z to the annular space 7:, in which, by the force of theoutward current, it rises, pressing outwardly against the entiresurface-of the inner pervious cylinder e. It then passes through theperforations of this cylinder and the filtering medium,

and is finally discharged into the surrounding By reason ,of the greatforce due to centrifugal action-the liquid can be forced throughfiltering matter whiclrit could not otherwise penetrate, and hence allimpurities orforeign,

matter, the particles of which are less minute than those of the liquidto be purified will be retained, and none but the pure liquid willescape. I have discovered that by this apparatus I am enabled todecolorize saccharine juices, rectify spirits,- and purify other liquids in the nost perfect manner and in much less time than by any otherknown means.

WVhat Iclaim as my invention, and desire to secure by Letters Patent,is-

1. Constructing the centrifugal machine for filtering nlrposes withanannular filteringchaniber surrounding a central rece 'il ion-

